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Spinal adhesive arachnoiditis F086

Last amended 
28 June 2015

Current RMA Instruments:

Reasonable Hypothesis SOP116 of 2011
Balance of Probabilities SOP117 of 2011
Changes from Previous Instruments:

SOP Bulletin 153

ICD Coding
  • ICD-9-CM Codes: 322.9
  • CD-10-AM Codes: G03.9

This is a condition of chronic inflammation of one of the membranes that surrounds the spinal cord.  It can result in debilitating back pain and neurological deficits.

Is specific diagnostic evidence required to apply the SOP?Yes.

This diagnosis requires evidence from imaging or at operation of inflammation of the arachnoid mater of the spinal cord.

Are there sub-factors that require specific information? – No.

RMA SOP definition of spinal adhesive arachnoiditis (Instruments Nos. 116 and 117 of ‘11).

Additional diagnoses covered by SOP
  • Arachnoiditis ossificans
  • Chronic spinal arachnoiditis
  • Lumbar adhesive arachnoiditis
Conditions excluded from SOP

·     Arachnoiditis of brain or cranial nerves

Unconfirmed diagnosis

If, after applying the above information, you are unable to confirm the diagnosis, you should then:

  1. seek medical officer advice about further investigation, or;
  2. generate a diagnostic report, or;
  3. re-encode the condition, if appropriate.

The following investigations may be useful in establishing the diagnosis.

  • Report from a neurologist
  • Report of an MRI scan